Patient Bill Pay

QuestDirect Self-Ordered Lab TestsDid you know DLO offers lab testing without a physician's visit? With QuestDirect™, you are able to purchase your own labs from a select list of tests without a doctor's visit. Choose from general health tests, allergy testing, immunity screening, infectious disease testing, and more. For more information, visit

Quest Diagnostics LogoThrough our affiliation with Quest Diagnostics, DLO is happy to offer a fast, simple and convenient online bill pay service, as well as a tool to update your insurance information. All you need is a copy of your current bill or invoice. To get started, click the link below:



Do you have a question regarding a DLO bill or invoice? Call 1-888-241-7742 and speak to a customer service specialist today. You may also email the billing department by clicking the link below:

Email Billing Customer Service*

Who is Quest Diagnostics?

Quest Diagnostics is the world's leading provider of diagnostic testing, information and services that patients and doctors need to make better health care decisions. The company offers the broadest access to diagnostic testing services through its network of laboratories and patient service centers, and provides interpretive consultation through its extensive medical and scientific staff. Quest Diagnostics is a pioneer in developing innovative new diagnostic tests and advanced health care information technology solutions that help improve patient care.

*Clicking the "Pay My Bill" or "Email Billing Customer Service" links will take you to the website of Quest Diagnostics, the nation’s leading provider of diagnostic testing, information and services. Through our unique affiliation, DLO is able to offer many of Quest Diagnostics' online services as a resource to Oklahoma health care professionals and patients.